Vulnerability · Published Oct 2, 2026 · Assigned by Moxa
CVE-2026-86326
High 8.6
In plain English
A high-severity security flaw in MGate MB3170 Series from Moxa. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Official description
An improper verification of cryptographic signature vulnerability exists in protocol gateways because the device does not properly verify the cryptographic authenticity of firmware images before installation. An attacker with high privileges and access to the firmware update interface could provide a specially crafted or modified firmware image, causing it to be installed on the device. Successful exploitation could allow the attacker to execute unauthorized code, compromise the integrity and availability of the device, and persist malicious modifications across subsequent firmware updates.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Moxa | MGate MB3170 Series | 1.0 |
| Moxa | MGate MB3270 Series | 1.0 |
Weakness: CWE-347 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N